But they say these special canines also return false-positives, meaning they may smell methane from a decomposed animal or nearby sewer line, too.

The bone was found while officers were digging two-feet into the ground.

"We have located a bone, a partial bone anyway," said Childress. "We had some expert, an anthropologist come out and take a look at the bone. The initial indication is this bone is not human."

Police say the bone will be analyzed further.

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Around 3 p.m. Wednesday, police say three people told construction workers demolishing an abandoned house that a woman's body is buried underneath it, according to Commander Brian Childress, with the Valdosta Police Department.

That lead officers to re-open a 1989 missing persons case, in which a woman was last seen at her boyfriend's home here.

Since about 9 a.m. Thursday, police have been excavating both this property and Veolia landfill for human remains.

"At this point, I don't have a dead body, or any remains of a human being," said Childress, with the Valdosta Police Department. "But in an effort to be thorough, we have detectives behind me. What they're doing now is combing through the debris."

Police say there's no evidence indicating the missing woman is dead.

They're questioning friends and family for clues, some of whom live in towns north of Valdosta.

Officers are determined to unravel these allegations.

They will continue investigating the scene until a conclusive report is reached.

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